social theory: the best way to make new friends is to invite people to do an activity that will occupy enough of their brain capacity such that their defenses will be down and they’ll be a more open version of themselves
In other words, siblings are forced together, and then suddenly they’re not. The independence of adulthood—when proximity is no longer required and the obligations lessen—creates opportunities for siblings to build, repair, or discard the relationships of their youth, to stay stuck in or break free of the roles they played as children.
From Esther Perel's Blog - Letters From Esther #37: Eroticism is an Art. But It’s Also a Practice.